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Chapter 12
Plots
Figure 12-8
Cox Regression dialog box,Plots t ab
The Plots tab allows you to request plots of the hazard function, survival function, log-minus-log
of the survival function, and one minus the survival function. Youcan also choose to plot
confidence intervalsalong the specified functions; the confidence level is set on the Op tions tab.
Predictorpatterns. Youcan specify a pattern of predictor values to be used for the requested plots
and the exported survival file on the Export tab. Note that these options are not available if
time-dependent predictors defined on the Predictors tab are included in the model.
PlotFactors at. By default, each factor is evaluated at its highest level. Enter or select a
different level if desired. Alternatively, you can choose to plot separate lines for each level
of a single factor by selecting the check boxfor that factor.
PlotCovariates at. Each covariate is evaluated at its mean. Enter or select a different value
if desired.